RADIAL ENGINE WITH PISTON CONFIGURATION TO PREVENT HYDRO-LOCK

摘要

A radial type internal combustion engine and dry sump oil scavenging system may include a crankshaft and a plurality of piston-cylinder pairs. Each piston and cylinder pair defines a combustion chamber where oil may accumulate after the engine is non-operational, e.g., shut down. Each piston may include a plurality of pass through chambers that allow oil to enter and pass through into an oil retention cavity. The accumulation of oil in the oil retention cavity eliminates the hydrolock problem and prevents the radial engine from being severely or permanently damaged upon engine startup.